How about a 15-150mm f/2.8 or faster zoom that is also lightweight and affordable and has good image quality. It would sell loads!
A 50-150 on a DX sensor would be an 75/80-225/250 lens.
Why is there a slow 50-500 and not a fast 50-150?
Yes, I guess people using that lens on FX crop are not really looking for a 50-150, but already have some gear and don't want to splash for a fast DX body or a 70-200.
It still stands that 50-150 FX would be a very useful range.
Why is there a slow 50-500 and not a fast 50-150?
And while they're at it, I'd like an affordable 8-500mm f/2L! But it has to be under $300 and under 5 lbs. That would really complete my lens collection
f/2? Please!
Let's see an 8-500mm f/1.4L IS w/ that new fangled pop-in 1.4x TC and it might get decent reviews.
So, why don't you go for a 70-200?
Because there isn't a large enough market- if an award-winning lens in this FL gets sold for only two years, that shows the market isn't large enough at the necessary price point.
No the difference between a 50-150 f2.8 zoom and a trio of 1.4 (or f/2 at the longer end) primes will always be more speed and shallower DoF. To move a three-prime setup to a single zoom would be at the cost of 1-2 stops, taking what start out as excellent portrait primes and turning them into just another PJ zoom.
I'm not sure 50 is really in the ideal portrait range either, as it is effectively the "normal" field of view. For crop sensors, maybe- but there is already a 50-150 product for that (which essentially replicates the function of 70-200 on FX)
Ruahrc
What lens are you talking about?
My bad, the lens I was thinking of wasn't FX.
In that case, there's a new version of the Sigma 50-150 DC with OS coming out that was announced some months ago.
I'm confused now, the sigma is a DX lens, essentially the equivalent of the 70-200 for FX. What does it have to do with this thread- which is 50-150 for FF?
Yes, and I doubt it'll show the world that there was an amazingly large market- I don't think it'll do poorly, but I don't think it'll be all that earth-shattering either.